==========================================================================
Ubuntu Security Notice USN-7889-5
December 05, 2025

linux-ibm-6.8 vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-ibm-6.8: Linux kernel for IBM cloud systems

Details:

Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
  - Media drivers;
  - Network drivers;
  - Netfilter;
  - TLS protocol;
(CVE-2025-21729, CVE-2025-38227, CVE-2025-38616, CVE-2025-38678)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 22.04 LTS
  linux-image-6.8.0-1041-ibm      6.8.0-1041.41~22.04.1
  linux-image-ibm-6.8             6.8.0-1041.41~22.04.1

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References:
  https://ubuntu.com/security/notices/USN-7889-5
  https://ubuntu.com/security/notices/USN-7889-4
  https://ubuntu.com/security/notices/USN-7889-3
  https://ubuntu.com/security/notices/USN-7889-2
  https://ubuntu.com/security/notices/USN-7889-1
  CVE-2025-21729, CVE-2025-38227, CVE-2025-38616, CVE-2025-38678

Package Information:
  https://launchpad.net/ubuntu/+source/linux-ibm-6.8/6.8.0-1041.41~22.04.1